Somali President Mohamed Abdullahi Mohamed vowed Wednesday to step up the war against Al-Shabaab, as he addressed thousands at a rally in Mogadishu for the victims of the city’s worst-ever bombing.

Protesters wearing red bands around their heads marched through the scene of the truck bombing, a once bustling district, before gathering at a stadium where they chanted: “We are ready to fight”.

Residents of the Somali capital, while wearily accustomed to regular bombs and attacks by the Islamist militants, have been outraged by the strike on Saturday which left at least 276 dead and 300 wounded.

There has been no immediate claim of responsibility, but the Shabaab, a militant group aligned with Al-Qaeda, carries out regular suicide bombings in Mogadishu in its bid to overthrow Somalia’s internationally-backed government.

The president, better known by his nickname Farmajo, said the attack “shows that we have not done enough to stop Shabaab.”